Abrams, R., and K. J. Frey. “Relationship Between Ethyl Methanesulphonate Concentration and Immersion Interval, and Germination and Seedling Vigor in Oats”. The Journal of Agriculture of the University of Puerto Rico, vol. 48, no. 4, Oct. 1964, pp. 308-11, doi:10.46429/jaupr.v48i4.12999.